/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.flink.table.filesystem.stream.compact;

import java.io.Closeable;
import java.io.IOException;
import java.io.Serializable;

/** Reader for compaction. */
public interface CompactReader<T> extends Closeable {

    /** Read a record, return null if no more record. */
    T read() throws IOException;

    /** Factory to create {@link CompactReader}. */
    interface Factory<T> extends Serializable {
        CompactReader<T> create(CompactContext context) throws IOException;
    }
}
